Keystones — Lintel
Five GCSE retrieval questions · 29 August 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 144. What are the numbers?
Answer: 47, 48, and 49 -
2. Algebra
Solve: 7x = 49
Answer: x = 7 -
3. Geometry
Calculate the hypotenuse when a = 7cm and b = 7cm
Answer: 9.9cm -
4. Ratio
Find 77% of 309
Answer: 237.93 -
5. Statistics
A bag has 8 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 8⁄11